Every (13k - 6)-strong tournament with minimum out-degree at least 28k - 13 is k-linked. - Jørgen Bang-Jensen; Kasper Skov Johansen (Discret. Math., 2022)

Making a tournament k $k$-strong. - Jørgen Bang-Jensen; Kasper Skov Johansen; Anders Yeo (J. Graph Theory, 2023)

Edge-Connectivity Augmentation of Simple Graphs. - Kasper Skov Johansen; Eva Rotenberg; Carsten Thomassen (SIAM J. Discret. Math., 2025)